Glaukos (GKOS) development chief sells 1,537 shares under 10b5-1 plan

Rhea-AI Filing Summary

Glaukos Corp’s chief development officer Tomas Navratil sold 1,537 shares of common stock in an open-market trade. The sale was executed at an average price of $130.68 per share under a Rule 10b5-1 trading plan adopted on March 12, 2026.

After this transaction, he directly holds 88,833 shares of Glaukos common stock, which includes 39,791 restricted stock units that have not yet vested or been delivered.

Insider Trade Summary 10b5-1

Net Seller: 1,537 shares ($200,855)

Net Sell 1 txn

Insider Navratil Tomas

Role CHIEF DEVELOPMENT OFFICER

Sold 1,537 shs ($201K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,537	$130.68	$201K

Holdings After Transaction: Common Stock — 88,833 shares (Direct, null)

Footnotes (1)

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2026. Includes 39,791 restricted stock units that have not yet vested or been delivered to the Reporting Person.

Key Figures

Shares sold: 1,537 shares Sale price: $130.68 per share Shares held after sale: 88,833 shares +2 more

5 metrics

Shares sold 1,537 shares Open-market sale on Form 4

Sale price $130.68 per share Average sale price for common stock

Shares held after sale 88,833 shares Direct ownership following transaction

Unvested RSUs 39,791 units Restricted stock units not yet vested or delivered

10b5-1 plan adoption date March 12, 2026 Pre-arranged trading plan for sales

Key Terms

Rule 10b5-1 trading plan, restricted stock units, open-market sale

3 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

restricted stock units financial

"Includes 39,791 restricted stock units that have not yet vested or been delivered"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Navratil Tomas

(Last) (First) (Middle)

C/O GLAUKOS CORPORATION

ONE GLAUKOS WAY

(Street)

ALISO VIEJO CALIFORNIA 92656

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GLAUKOS Corp [ GKOS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF DEVELOPMENT OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/16/2026		S(1)		1,537	D	$130.68	88,833(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 12, 2026.

2. Includes 39,791 restricted stock units that have not yet vested or been delivered to the Reporting Person.

	Diana Scherer, Attorney-in-Fact	06/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Glaukos (GKOS) executive Tomas Navratil do in this Form 4 filing?

Tomas Navratil, Glaukos’ chief development officer, reported selling 1,537 shares of common stock. The sale was an open-market transaction executed under a pre-established Rule 10b5-1 trading plan.

How many Glaukos (GKOS) shares did the executive sell and at what price?

He sold 1,537 Glaukos common shares at an average price of $130.68 per share. This was an open-market sale disclosed as part of his Form 4 insider trading report.

How many Glaukos (GKOS) shares does Tomas Navratil hold after the sale?

After the reported sale, Tomas Navratil directly holds 88,833 shares of Glaukos common stock. This figure reflects his remaining direct ownership position following the 1,537-share disposition.

Were any of Tomas Navratil’s Glaukos (GKOS) shares unvested at the time of the filing?

Yes. His reported holdings include 39,791 restricted stock units. These RSUs have not yet vested or been delivered, meaning they represent future potential share deliveries subject to vesting conditions.

Was the Glaukos (GKOS) insider sale by Tomas Navratil pre-planned?

Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted on March 12, 2026. Such plans schedule trades in advance to reduce timing-related concerns.